//
// type-check value of type tid, about to be copied,
// and return its size.
//
func tchk(t *Tent, s interface{}) uint {
var (
ep int
f float32
)
switch t.fmt {
case 'b', 'c', 'i', 'e', 'h', 'z', 'u':
switch s.(type) {
case []byte:
eep, err := pbytes.UnmarshalBinary(s.([]byte), int32(ep))
if err != nil {
panic("tchk umarshal")
}
ep = int(eep.(int32))
case *int:
ep = *s.(*int)
default:
panic("wrong type in tchk")
}
if ep<t.first || ep>t.last {
panic("assigned value out of range")
}
case 'l':
ifc, err := pbytes.UnmarshalBinary(mst.stack[mst.sp:], f)
if err != nil {
panic("tchk float")
}
f := ifc.(float32)
if f<float32(t.first) || f>float32(t.last) {
panic("assigned value out of range")
}
case 'p':
// check pointer value
case 'a':
//
// Arrays may be used as buffer space,
// and it is not reasonable to require the
// entire array to be ok regarding values.
// So, disable this check.
//
case 'R':
cp := s.([]byte) //TODO offsets, etc, see original picky and reslice
for i := 0; i < t.nitems; i++ {
nt := &mabs.tents[t.fields[i].tid]
tchk(nt, cp[0:int(nt.sz)])
cp = cp[nt.sz:]
}
}
return t.sz
}
func ptrU64(p *byte) (u uint64) {
ps := sliceptr(uintptr(unsafe.Pointer(p)), p64sz)
ifc, err := pbytes.UnmarshalBinary(ps, uintptr(unsafe.Pointer(p)))
if err != nil {
panic("ptrPtr marshal")
}
return ifc.(uint64)
}
func ptrU32(p *byte) (u uint32) {
ps := sliceptr(uintptr(unsafe.Pointer(p)), p32sz)
ifc, err := pbytes.UnmarshalBinary(ps, u)
if err != nil {
panic("ptrPtr marshal")
}
u = ifc.(uint32)
return u
}
func ptrPtr(p uintptr) (pt *Ptr) {
if unsafe.Sizeof(pt) > p64sz {
panic("pointers are too big")
}
ps := sliceptr(p, p64sz)
ifc, err := pbytes.UnmarshalBinary(ps, p)
if err != nil {
panic("ptrPtr marshal")
}
return (*Ptr)(unsafe.Pointer(ifc.(uintptr)))
}
func top64() uint64 {
var (
n uint64
err error
ifc interface{}
)
if mst.sp < 8 {
panic("stack underflow")
}
ifc, err = pbytes.UnmarshalBinary(mst.stack[mst.sp:], n)
if err != nil {
panic("top64 unmarshal")
}
n = ifc.(uint64)
return n
}
func top32() uint32 {
var (
n uint32
err error
ifc interface{}
)
if mst.sp < 4 {
panic("stack underflow")
}
ifc, err = pbytes.UnmarshalBinary(mst.stack[mst.sp:], n)
if err != nil {
panic("top32 unmarshal")
}
n = ifc.(uint32)
return n
}
func topr() float64 {
var (
n float32
err error
ifc interface{}
)
if mst.sp < 4 {
panic("stack underflow")
}
ifc, err = pbytes.UnmarshalBinary(mst.stack[mst.sp:], n)
if err != nil {
panic("topr unmarshal")
}
n = ifc.(float32)
c := float64(n)
if math.IsNaN(c) {
panic("invalid operation on float")
}
return c
}
func popn(sz int) string {
var (
rv rune
err error
ifc interface{}
)
r := make([]byte, sz)
if mst.sp < sz {
panic("stack underflow")
}
mst.sp -= sz
ifc, err = pbytes.UnmarshalBinary(mst.stack[mst.sp:mst.sp+sz], r)
if err != nil {
panic("popn unmarshal")
}
p := ifc.([]byte)
s := make([]byte, 0)
for i := 0; i < sz; i += 4 {
rv, _ = utf8.DecodeRune(p[i : i+4])
s = append(s, byte(rv))
}
return string(s)
}
func (v *Vmem) String() string {
var (
nv Vmem
err error
ifc interface{}
)
t := &mabs.tents[v.tid]
s := ""
switch t.fmt {
case 'b':
var e uint32
ifc, err = pbytes.UnmarshalBinary(v.elem, e)
if err != nil {
panic("vmem umarshal")
}
e = ifc.(uint32)
if e != 0 {
s += fmt.Sprintf("True")
} else {
s += fmt.Sprintf("False")
}
case 'c':
var e rune
ifc, err = pbytes.UnmarshalBinary(v.elem, e)
if err != nil {
panic("vmem umarshal")
}
e = ifc.(rune)
s += dumpc(e)
case 'i':
var e uint32
ifc, err = pbytes.UnmarshalBinary(v.elem, e)
if err != nil {
panic("vmem umarshal")
}
e = ifc.(uint32)
ee := int(int32(e))
if ee<t.first || ee>t.last {
s += fmt.Sprintf("out of range")
} else {
s += fmt.Sprintf("%d", ee)
}
break
case 'e', 'h':
var e int
ifc, err = pbytes.UnmarshalBinary(v.elem, e)
if err != nil {
panic("vmem umarshal")
}
e = ifc.(int)
if e<t.first || e>t.last {
s += fmt.Sprintf("out of range")
} else {
s += fmt.Sprintf("%s", t.lits[e-t.first])
}
case 'r', 'l':
var e float32
ifc, err = pbytes.UnmarshalBinary(v.elem, e)
if err != nil {
panic("vmem umarshal")
}
e = ifc.(float32)
s += floatfmt(float64(e))
case 'p':
var e uintptr
ifc, err = pbytes.UnmarshalBinary(v.elem, e)
if err != nil {
panic("vmem umarshal")
}
e = ifc.(uintptr)
if e != 0 {
s += fmt.Sprintf("%#x", e)
} else {
s += "nil"
}
case 'a':
if mabs.tents[t.etid].fmt == 'c' {
var e string
ifc, err = pbytes.UnmarshalBinary(v.elem, e)
if err != nil {
panic("vmem umarshal")
}
e = ifc.(string)
s += fmt.Sprintf("\"")
s += fmt.Sprintf("%s", e)
s += fmt.Sprintf("\"")
break
}
s += fmt.Sprintf("{\n")
vlvl++
nv.tid = int(t.etid)
st := uint(0)
for i := 0; i < t.nitems; i++ {
s += tabs(vlvl)
nv.elem = v.elem[st : st+mabs.tents[t.etid].sz]
s += fmt.Sprintf("[%d] %v,\n", i, nv)
st += mabs.tents[t.etid].sz
}
vlvl--
s += tabs(vlvl)
s += fmt.Sprintf("}")
case 'R':
s += fmt.Sprintf("{\n")
vlvl++
st := uint(0)
for i := 0; i < t.nitems; i++ {
fld := t.fields[i]
nv.tid = int(fld.tid)
nv.elem = v.elem[st : st+mabs.tents[nv.tid].sz]
s += tabs(vlvl)
s += fmt.Sprintf(".%s = %v,\n", fld.name, nv)
}
vlvl--
s += tabs(vlvl)
s += fmt.Sprintf("}")
case 'X':
s += fmt.Sprintf("<procedure>")
case 'f':
var e int
ifc, err = pbytes.UnmarshalBinary(v.elem, e)
if err != nil {
panic("vmem umarshal")
}
e = ifc.(int)
if e<0 || e>=len(files) {
s += fmt.Sprintf("invalid file")
return s
}
if files[e] == nil {
s += fmt.Sprintf("closed file")
return s
}
switch e {
case 0:
s += fmt.Sprintf("<stdin>")
break
case 1:
s += fmt.Sprintf("<stdout>")
break
default:
s += fmt.Sprintf("<file #%d %s>", e, files[e])
}
case 'F':
s += fmt.Sprintf("<function>")
break
case 's':
var e string
ifc, err = pbytes.UnmarshalBinary(v.elem, e)
if err != nil {
panic("vmem umarshal")
}
e = ifc.(string)
s += fmt.Sprintf("\"")
s += fmt.Sprintf("%s", e)
s += fmt.Sprintf("\"")
default:
errs := fmt.Sprintf("vfmt: fmt %x", t.fmt)
panic(errs)
}
return s
}